Analyzing device

Abstract

An analyzing device includes a splitting part for causing fluid containing a sample component to flow separately in a first flow passage and a second flow passage; an analyzing column provided on the first flow passage for separating the sample component from the fluid; a first back pressure regulating valve corresponding to a first pressure controlling unit for controlling a pressure in the first flow passage; and a second back pressure regulating valve corresponding to a second pressure controlling unit for controlling a pressure in the second flow passage, wherein flow rate of the fluid in the first flow passage and flow rate of the fluid in the second flow passage are controlled based on a ratio of the pressure in the first flow passage to the pressure in the second flow passage.

1 . An analyzing device comprising:
 a) a splitting part for causing supercritical fluid containing a sample component to flow separately in a first flow passage and a second flow passage;   b) a column provided on the first flow passage for separating the sample component from the supercritical fluid;   c) a first pressure controlling unit for controlling a pressure in the first flow passage;   d) a second pressure controlling unit for controlling a pressure in the second flow passage; and   flow rate of the supercritical fluid in the first flow passage and flow rate of the supercritical fluid in the second flow passage are controlled based on a ratio of the pressure in the first flow passage to the pressure in the second flow passage.   
     
     
         2 . (canceled) 
     
     
         3 . The analyzing device according to  claim 1 , wherein a sum of values of the pressure in the first flow passage and the pressure in the second flow passage is a value of a pressure exceeding a critical pressure of the supercritical fluid. 
     
     
         4 . The analyzing device according to  claim 1 , wherein
 the first pressure controlling unit has a first pressure controlling valve provided on the first flow passage, and   the second pressure controlling unit has a second pressure controlling valve provided on the second flow passage.   
     
     
         5 . (canceled) 
     
     
         6 . (canceled) 
     
     
         7 . An analyzing method comprising the steps of:
 a) controlling a pressure in a first flow passage by a first pressure controlling unit;   b) controlling a pressure in a second flow passage by a second pressure controlling unit;   c) controlling flow rate of supercritical fluid containing a sample component in the first flow passage and flow rate of supercritical fluid containing a sample in the second flow passage based on a ratio of the pressure in the first flow passage to the pressure in the second flow passage;   d) splitting the supercritical fluid to flow separately in the first flow passage and the second flow passage by means of a splitting part; and   e) separating the sample component from the supercritical fluid using a column provided on the first flow passage, wherein   an extracting unit that outputs the supercritical fluid containing the sample component is connected upstream of the splitting part.   
     
     
         8 . (canceled) 
     
     
         9 . The analyzing method according to  claim 7 , wherein a sum of values of the pressure in the first flow passage and the pressure in the second flow passage is a value of a pressure exceeding a critical pressure of the supercritical fluid. 
     
     
         10 . The analyzing method according to  claim 7 , wherein
 the first pressure controlling unit has a first pressure controlling valve provided on the first flow passage, and   the second pressure controlling unit has a second pressure controlling valve provided on the second flow passage.   
     
     
         11 . (canceled) 
     
     
         12 . (canceled)